Key-operated lock



Nov. 19, 1929. R. H. KLINGEL 1,735,858

KEY OPERATED LOCK FiledApril 14. 1926 Patented Nov. 19, 192 9 ROBERT H. KLINGEL, orpnnrnorr, 'mmmaim" j.

KEY-OPERATED Lock.

Application filed. April 14,

i 10 above class with additional locking means which will necessitate a special form of keynot easily reproduced, consequently sucha lock cannot be easily picked and there is a greater degree of safety by usingsuch a lock. My invention further aims to provide a locking mechanism that may be readily embodied in a lock of the key operated tumbler cylinder type without materially increasing the cost of manufacture, and the simple con- 0 struction entering into my invention will be hereinafter specifically described and then claimed. 7 r 1 Reference will now be had to the drawing, wherein Figure 1 is a longitudinal sectional View of the lock in an unlocked condition;

Fig. 2 is a similar view taken at a right angle to the showing in Fig. 1;

Fig. 3 is a cross sectional view of the lock;

Fig. 4 is a view similar to Fig. 2 showing the mechanism in a locked condition, and

Iiig. 5 is a persepctive view of a key for the 100 r.

In the drawings, the reference numeral 1 denotes a lock body and rotatable in said body is a cylinder 2 having its outer end pro vided with a head 3 countersunk in the body 1 and adapted to limit the inward movement of the cylinder relative to the body 1. The inner end of the cylinder 2 has an annular groove 4 and extending into said groove is the reduced end 5 of a screw 6 mounted in the body 1. This screw will prevent outward movement of the cylinder 2 relative to the body 1, but not interfere with cylinder rotation. The inner end of the cylinderis also designed, as at 7, for engagement with a bolt, latch or other holding device (not shown).

In the body 1 are a series of openings 8- for spring pressed body tumblers 9 adapted 1926. ser ai ivb ioigsei. f i

to be engaged by a series of cylinder pins:10 arranged in the cylinder 2 and adapted'to'be actuated'by the bits 11' of a key 12 insertible in a slot 13 of the cylinder 1. By reference to F ig. 3 it will be notedthat'thecylinder pins IOHarein openings 14 communicating with the slot 13 of the cylinder 2, said slot aifording a restriction that prevents the'cylinder'pins 10 from "completely entering ithe' slot. The pointedends of the cylinder. pins may protrude into'the'slot" to be actuated by thekeybits 11'; and the cylinder pins are adapted to push outwardly on the body'tumble rs9 and place said tumblers in retracted positions," so that the "keyP12-may' be used. to rotate the cylinder 2; 1 l T So far I have described a conventional form of tumbler cylinder lock rotatable by "abit key and it is in connection withsuch lock and key that I use the additional locking I 'In a' plane at substantially a rightangle to the plane of thebodytu'mblersi) and th'ecylinder pins 10, as'shownin Fig. 3, I provide cylinder 2 with a key pin 16 engageajblerwith the cylinder tumbler 15 to actuate and retract the same. The cylinder tumbler15 is'spring pressed, similar to one ofthe body tumblers 9, and the key pin 16 is slidable in a cylinder opening .17 having its innerendsreducedor restricted, as" at 18 This restricted send of.

the opening 17 communicates with theekey The key 12, in addition to the usual grooves,

flutes, or corrugations has a slot 20 with E1 dog 24 has a reduced end 26 engageable with the curved wall 21 of the slot 20 and the opposite end of the dog is engageable with the curved wall 22 of the slot 20, so that the piv- Y otal movement of the dog 24 is limited relative to the key.

somewhat the body'l with acylinder tumb1er15r'an'dthe .1 a

When the key 12 is inserted in its slot 13, the protruding portion of the dog 24 enters the groove 19 and as the key is pushed inwardly the cam surface 25 of the dog 24 impinges against the inner end wall of the groove 19, causing the reduced end 2601 the 'dog24' to-enter the reduced or restricted end -18 ofthepin: opening 17 and engage the key pin 16. The key pin 16 pushes against. the spring pressed cylinder tumbler 15 to the extent of clearing the pin opening 17 as shown in Fig. 2. By this time the key bitsllhave caused retraction of the body tumblers 9 and the cylinder 2 can be-rotated by the key.

Since the dog 24 has a limited pivotal movement .in the key slot 20, said dog cannot assume a position crosswise of the'key and materially interfere with:v carrying the key on a ring or otherwise. Obviously the key cannot be easily or quickly reproduced and in orderthat there may be a large. variety of locks-shaving. differently located auxiliary locking mechanisms, the cylinder tumbler and key pin can be placed in different positions throughout the length of the body and cylinder, while the dog may be'atvarious positions intermediate the ends of thekey.

It is though that the utility of my invention 7 willbe apparent without further description, and while in" the drawing there is illustrated a preferred embodiment of my invention, it is" to be understood that the structural' ele- 'mentsare susceptible to'such variations and I modifications as fall. within: the scope of the appended claim.

What I claim is A key operated tumblercylinder lock comprising a body, a slotted rotatable cylinder in v said body,.key pins arranged radially in said cylinder at right angles-to each other, one

of said pins being adapted to: enter, said-slot,

spring pressed tumblers-behindsaid pins for locking said rotatable cylinder, whereby a key receivable in said slot and adapted to env'gage' one: of said pins, andcarrying a dog I movable by a part of said cylinder whereby to retract the'remaining pin, is adapted to re- 'lease and rotate said cylinder.

In testimony whereof I afli-xr'my signature.

' 'ROB'ERT'H. KLINGEL. 

